toadgirl - do you mind me asking how old you are?
Not at all :) I'm 48.
The reason I ask is that I think that sometimes it takes a long time to unlearn the habits we picked up from dysfunctional parental relationships
Agree 100%. I wish I'd had counselling years ago, but then I didn't realise I had a problem!
My mother sounds quite similar to yours: a mixture of volatility and an inability to take responsibility for it (her anger is always someone else's fault, and she absolutely refuses to give any credence to the more modern theory of emotions, that we are all responsible for how we respond)
Yes, our mothers do sound alike. I used to be scared of her rages when we were kids. She never hurt us physically though, but it was all emotional. One time, she tore the head of one of my teddybears whilst screaming about something or other. I think she was actually angry with my Dad about something rather than something I'd done.
It took me about as long as I spent in her 'care' to realise what was wrong and to change out of that path myself, and it was a lot of work to unsettle those relationships. It wasn't really until my mid 30s that I was able to say I was completely free of the same patterning (am 38 now)
Yes, it took me years to realise my communication style was wrong, especially when upset. I don't have a temper as such but I nag, criticise, go on and on long after the subject should be closed, raise my voice, say things I don't really mean to get a reaction...urgh! I am very good at apologising first though 
It's only in my 40s I've felt the difference. My husband and I have had some tough times and most of it has been our rotten communication. We have reached a new level of understanding and I am so glad I didn't give up. There's so much good about us as a couple. On the plus side, my husband is so forgiving, no matter what. He is a rock and has never mentioned leaving or anything. I think that's steadied me and made me feel secure and I've relaxed as a result of that.
I am enjoying this conversation and hope it will be helpful to the OP.